Improvement in keepers for door-locks



UNITED STATES lli- ITENT OEEIGE.

GEORGE W. DA OUNHA, OE NEW YORK, N. Y.

IMPROVEMENT IN KEEPRS FOR DOOR-LOCKS.

Specification forming part of Letters Patent No. 64,847, dated May 21,1867.

To all whom t may concern:

Be it known that I, GEORGE W. DA GUNHA, of the city, county, and Stateof N ew York, have invented a new and Improved Catch for Door-Locks; andI do hereby declare that the following is a full, clear, and exactdescription thereof, whiclrwill enable others skilled in the art to makeand use the same, reference being had to the accompanying drawings,forming part of this specification, in which- Figure l is a side View ofa portion of a door-jamb with my improved door-catch. attached. Fig. 2is a front view of the same, part being broken away to show theconstruction; and Fig. 3 is a detail cross-section of the same,

taken through the line x x, Fig. '1.l

Similar letters of reference indicate corresponding parts.

My invention consists in an improved catch or nosing for door-locks,formed with a flange to project along the jamb, and with a ilange toproject along the casing, the whole being cast solid in one piece, ashereinafter more fully described.

A is the jamb, B is the casing, and C is the blocking or frame of thedoorway, about the construction of which parts there is nothing new. Dis the catch or nosing, which receives the bolt or bolts of the lock.The ends of the catch D are made in the shape shown in dotted lines inFig. 3, and they are let into notches cut in the casing B and jamb A fortheir reception. dl is a plate, cast solid with the projecting endsofthe end plates of the catch, and which lies along or is let into thejamb A, as shown in Fig. 3.

The angles formed by the intersection of the ilange d1 with theendplates of the catch are lled up, as shown in Fig. 2, so as tostrengthen the catch at those points.

d?. is a flange cast upon the rear side of the catch D, which rests uponthe crossing B, vas shown in Figs. 2 and 3, and which is strengthene'dby a rib, d", cast in the angle of said catch, as shown in Figs. 1 and2. This construction enables the catch D to be secured by screws passingthrough the flange d1, and screwing into the jambA or casing B, in sucha direction that the strains upon the catch will be in a line at rightangles to the length of the screws-that is, in the direction that willenable them to resist the greatest strain, and that will be less likelyto loosen them in their places.

The catch `D is still further secured by a screw or screws passingthrough the flange d2 and screwing into the casing A, which enables itto resist the strain caused by the spring-bolt of the lock in closingthe door. This construction enables me to furnish a catch strong, notliable to get out of place, and which cannot be forced off withoutbreaking the solid substance of the catch or tearing away the casing andjamb from their places.

I claim as new and desire to secure by Let ters Patent- An improvedcatch or nosing for door-locks, formed with a iiange, d, to projectalong or be let into the jamb, and with a iiange, d2, to project alongthe casing, said iianges being cast solid with, and forming an integralpart of, the side catch, substantially `as herein shown and described,and for the purpose set forth.

The above specification of my invention signed by me this 18th day ofJanuary, 1867.

v GEO. W. DA CUNHA.

Witnesses:

WM. F. MCNAMARA, VJAMES T. GRAHAM.

